Frost dates in Martelle, IA
The average last spring frost in Martelle is around April 26 and the first fall frost is around October 17. That gives Martelle an average growing season of about 174 days.
Last spring frost
| Early (10% chance after) | April 18 |
|---|---|
| Average (50%) | April 26 |
| Late (90%) | May 11 |
First fall frost
| Early (10%) | October 9 |
|---|---|
| Average (50%) | October 17 |
| Late (90% chance before) | October 23 |